Improvement in lamps



J. M. A. DEW.

Lamp.

Patented Aug. 3l". 1869.

772227/665 66' 5am M N. PETERS. Ptmwlnnognphen wnmingwn, D. c,

iuiid gluten @Mendiburu JAMES `M. A'. DEW, OF CHICAGO, ILLINOIASSIGNOR TOI-IIMSELF AND OSWELL A. BOGUE, OF SAME PLACE.

5 neem Patent No. 94,295, lated August 31, 1869.

IMPROVEMENT IN LAMPS.

The Schedule referred to in these Letters Patent and making parl: of the same..

To all whom t may concern:

accompanying drawings, making part of this specifi-` cation, and to the letters of reference marked thereon, like 1etters indicating like parts wherever they occur.

To enable others skilled in the art to construct and use my invention, I will proceed to describe it.

The accompanying drawing represents a vertical section of the lamp.

The object ot my inventionisto improve the kerosene-oil lamp, adapting the samehmore particularly to use on railroad-cars; and

' Its nature consists lin so shaping the lamp and vproviding the same with a metallic tube, so arranged and placed that when the lamp falls down and becomes upset, no excess of oil 'can flow to the flame and produce disastrous accidents.

It consists, also, in providingkerosene-oil lamps with an interior chamber,'so arranged that it will prevent the formation of gaseous mixtures in the lamp, producing explosions.- f

'l The improvement consists, also, iu tinning .the interior surfaces of the chamber containing keroseneoil in lamps-made of brass, thereby preventing the formation of verdigiis inside of the said chamber.

The neckl a of the lamp A is provided with a screw-V thread, into which is screwed an ordinary burner, B, to which is securely' afxed a metallic tube, O, made long enough to almostl reach the bottom of the charnber E, the wick D passing through the said tube O'.

The chamber E of the lamp (that contains the oil) is constructed in the shape of a pear, the upper part of which, next below the neck c, is so swelled and proportioned,` that when the chamber E is lled with oil to the line as at, which shall always be the case when the lamp is arranged, and the lamp is turned so that the vertical line y y and the tube C assume horizontal positions, all the oil of the lamp would be coutained in the space of the chamber below the tube C,

so that whichever way the lamp falls, and in whatf" ever way it is upset, the oil cannot flow in excess tov the flame of the burner, and thereby produce accidents. y

F is a chamber made in the upper part of the chamber E, and is provided with a smallv opening, d, comi municating with the chamber Eaud with a small opening, f, communicating with the atmosphere, both made for the purpose of allowing the gases or vapors arising and forming in excess from kerosene-oil to exy pel the Vair and escape themselves out of the chamber E, thus acting asa safety-valve, and preventing thereby the formation of the explosive gaseous mixtures inside ofthe lamp. 4

Ylllhen the body or chamber E 'of the lamp, is made of brass, verdigris is formed by the action of the oil, and in order to prevent this and keep the interior of the lamp free from this substance, I thoroughly tin it.

What I claim as new, and desire to secure by Letters Patent, isj 1. A kerosene-oil lamp, consisting of the body E, chamber Il", and burner B, with tube O attached, all constructed and arranged as herein shown and de.-

scribed.

2. .Ilie chamber. F, in combination with the body of i Witnesses:

J. B. TURCHIN, G. A. MARINER. 

